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sys: rename: only do MmFlushImageSection when ImageSectionObject is not NULL

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This commit is contained in:
Bill Zissimopoulos
2016-11-24 15:09:39 -08:00
parent 29c140b9cd
commit 5444ce7f50
2 changed files with 102 additions and 1 deletions
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12
src/sys/file.c
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@ -1076,10 +1076,20 @@ NTSTATUS FspFileNodeRenameCheck(PDEVICE_OBJECT FsvolDeviceObject, PIRP OplockIrp
DescendantFileNode = DescendantFileNodes[DescendantFileNodeIndex];
DescendantFileNode = (PVOID)((UINT_PTR)DescendantFileNode & ~7);
/*
* Windows file systems do not allow the replaced file to be a directory.
* However POSIX allows this (when the directory is empty).
*
* For this reason we will allow the case where the replaced file is a directory
* (without any open files within it). The user mode file system can always fail
* such requests if it wants.
*/
if ((DescendantFileNode->FileName.Length > FileName->Length &&
L'\\' == DescendantFileNode->FileName.Buffer[FileName->Length / sizeof(WCHAR)]) ||
(0 != DescendantFileNode->NonPaged->SectionObjectPointers.ImageSectionObject &&
!MmFlushImageSection(&DescendantFileNode->NonPaged->SectionObjectPointers,
MmFlushForDelete))
MmFlushForDelete)))
{
/* release the FileNode in case of failure! */
FspFileNodeReleaseF(FileNode, AcquireFlags);